<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>

    while(true){
      let uerName=prompt("输入用户名撒")
    let passWord=prompt(`输入密码`)
      if(uerName==="admin"&&passWord==="123456"){
      alert('登陆成功')
      break
      
    }
      else{
      alert(`重新登录`)
      }
    }
    
  </script>
</body>
</html>